- Error code
- OS 74
- Category
- Remote shutdown
- Manufacturer
- KACO
1What the error means
The grid operator is limiting the feed-in power of the inverter. An external command, not a fault of the device.
On the display or in the monitoring software it appears as OS 74.
2Possible causes
- The inverter was switched off by an external signal or by the operator
- Open contact on the remote control input
3What to do
- Check the remote shutdown input and its jumper.
- Confirm that there is no curtailment command from the grid operator.
4Repair by Aineas
You send the inverter to our lab in Thessaloniki. We diagnose it, inform you of the fault and the cost, and the repair starts only after you approve it. Every inverter is tested under simulated operating conditions before delivery.